AD603 Datasheet, PDF (11/14 Pages) Analog Devices – Low Noise, 90 MHz Variable-Gain Amplifier

2.50
2.00
45MHz
1.50
1.00
70MHz
10.7MHz
0.50
0.00
–0.50
–1.00
70MHz
455kHz
–1.50
–0.5 –0.4 –0.3 –0.2 –0.1 0.0 0.2 0.3 0.4 0.5 0.6
GAIN VOLTAGE – Volts
Figure 16. Gain Error vs. Gain Control
Voltage at 455 kHz, 10.7 MHz, 45 MHz,
70 MHz
100k
1M
10M
FREQUENCY – Hz
100M
Figure 17. Frequency and Phase
Response vs. Gain (Gain = –10 dB,
P_IN = –30 dBm, Pin 5 Connected to
Pin 7)
AD603
100k
1M
10M
FREQUENCY – Hz
100M
Figure 18. Frequency and Phase
Response vs. Gain (Gain = +10 dB,
P_IN = –30 dBm, Pin 5 Connected to
Pin 7)
100k
1M
10M
FREQUENCY – Hz
100M
Figure 19. Frequency and Phase
Response vs. Gain (Gain = +30 dB,
P_IN = –30 dBm, Pin 5 Connected to
Pin 7)
7.60
7.40
7.20
7.00
6.80
6.60
6.40
–0.6 –0.4 –0.2 0
0.2 0.4 0.6
GAIN CONTROL VOLTAGE – Volts
Figure 20. Group Delay vs. Gain
Control Voltage
HP3326A
DUAL
CHANNEL
SYNTHESIZER
100⍀
0.1␮F
+5V
0.1␮F
AD603
10؋
PROBE
HP3585A
SPECTRUM
ANALYZER
511⍀
–5V
DATEL
DVC 8500
Figure 21. Third Order Intermodula-
tion Distortion Test Setup
10dB/DIV
10dB/DIV
Figure 22. Third Order Intermodula-
tion Distortion at 455 kHz (10× Probe
Used to HP3585A Spectrum Analyzer,
Gain = 0 dB, P_IN = 0 dBm, Pin 5 Con-
nected to Pin 7)
Figure 23. Third Order Intermodula-
tion Distortion at 10.7 MHz (10× Probe
Used to HP3585A Spectrum Analyzer,
Gain = 0 dB, P_IN = 0 dBm, Pin 5 Con-
nected to Pin 7)
–1.0
–1.2
–1.4
–1.6
–1.8
–2.0
–2.2
–2.4
–2.6
–2.8
–3.0
–3.2
–3.4
0
50 100 200 500 1000 2000
LOAD RESISTANCE – ⍀
Figure 24. Typical Output Voltage
Swing vs. Load Resistance (Negative
Output Swing Limits First)
REV. C
–11–